About Halichoeres garnoti (Valenciennes, 1839)
The yellowhead wrasse, scientifically known as Halichoeres garnoti (Valenciennes, 1839), is a small fish that grows to a maximum length of 19 centimeters. Over its lifetime, this species changes both its sex and appearance, and the coloration of each life stage is quite variable. It has a thin, relatively elongated body with a terminal mouth. As a juvenile, it is mostly yellow, with a bright blue lateral stripe along its side. In its initial female phase, it has a dark back that sometimes shows bluish tints, paired with a yellow underside. Two short, wavy dark lines extend outward from the back edge of each eye, and there are dark spots on the front of its head. When it matures into an adult male, the head and front portion of the body are yellow, while the rear half of the body is silvery grey. A vertical blackish-blue bar and a broad blackish-blue stripe run along the margin of the dorsal fin. Starting from this dark blue stripe, three gradient-colored longitudinal lines are visible, which are green, blue, and pink to mauve in order; the blue line continues along the entire ventral side of the fish. The characteristic dark wavy lines near the eye and the associated black spots are still present in the adult male stage. The yellowhead wrasse is widely distributed across tropical and subtropical waters of the western Atlantic Ocean, the Caribbean Sea, and the Gulf of Mexico, ranging south to the northern coast of Venezuela. It is commonly found on coral reefs, sandy reefs, and among rocks, at depths down to approximately 60 meters (200 feet). It prefers areas with many small cavities that it can use to hide when threatened.
